77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
package main
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import (
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"context"
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"database/sql"
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"fmt"
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"sync"
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"time"
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"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
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"github.com/jackc/pgx/v5/pgxpool"
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_ "github.com/microsoft/go-mssqldb"
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log "github.com/sirupsen/logrus"
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)
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func connectToSqlServer() (*sql.DB, error) {
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db, err := sql.Open("sqlserver", config.App.SourceDbUrl)
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if err != nil {
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return nil, fmt.Errorf("Unable to connect to sqlserver: %w", err)
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}
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ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
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defer cancel()
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if err := db.PingContext(ctx); err != nil {
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return nil, fmt.Errorf("Unable to ping sqlserver: %w", err)
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}
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return db, nil
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}
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func connectToPostgres() (*pgxpool.Pool, error) {
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ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
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defer cancel()
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pool, err := pgxpool.New(ctx, config.App.TargetDbUrl)
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if err != nil {
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return nil, fmt.Errorf("Unable to connect to postgres: %w", err)
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}
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if err := pool.Ping(ctx); err != nil {
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pool.Close()
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return nil, fmt.Errorf("Unable to ping postgres: %w", err)
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}
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return pool, nil
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}
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func connectToDatabases() (*sql.DB, *pgxpool.Pool, error) {
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var sourceDbErr, targetDbErr error
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var sourceDb *sql.DB
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var targetDb *pgxpool.Pool
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var wg sync.WaitGroup
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wg.Go(func() {
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sourceDb, sourceDbErr = connectToSqlServer()
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if sourceDbErr != nil {
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log.Error("Unable to connect to source db: ", sourceDbErr)
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}
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})
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wg.Go(func() {
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targetDb, targetDbErr = connectToPostgres()
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if targetDbErr != nil {
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log.Error("Unable to connect to target db: ", targetDbErr)
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}
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})
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wg.Wait()
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if sourceDbErr != nil || targetDbErr != nil {
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return nil, nil, fmt.Errorf("Unable to connect to databases: %w (source), %w (target)", sourceDbErr, targetDbErr)
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}
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return sourceDb, targetDb, nil
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}
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